US9874262B2 - Protective device for a shock absorber - Google Patents

Protective device for a shock absorber Download PDF

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Publication number
US9874262B2
US9874262B2 US15/128,513 US201515128513A US9874262B2 US 9874262 B2 US9874262 B2 US 9874262B2 US 201515128513 A US201515128513 A US 201515128513A US 9874262 B2 US9874262 B2 US 9874262B2
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Prior art keywords
base area
protective device
base
shock absorber
area
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US15/128,513
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US20170276207A1 (en
Inventor
Thomas Schimetka
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SAF Holland GmbH
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SAF Holland GmbH
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Assigned to SAF-HOLLAND GMBH reassignment SAF-HOLLAND GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHIMETKA, Thomas
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/38—Covers for protection or appearance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/10—Enclosure elements, e.g. for protection

Definitions

  • the present invention relates to a protective device for a shock absorber, in particular a commercial vehicle shock absorber protective device, and to a shock absorber arrangement, in particular a commercial vehicle shock absorber arrangement, which comprises a protective device for the piston portion of the shock absorber.
  • An object of the present invention is to provide a protective device for a shock absorber, in particular a commercial vehicle shock absorber, and a shock absorber arrangement, in particular a commercial vehicle shock absorber arrangement, which are easy to fit and which ensure high operating reliability and a long service life.
  • a protective device for a shock absorber in particular a commercial vehicle shock absorber, comprising a first base area and a second base area, wherein the first base area and the second base area are connected to one another in such a way that via a swivel axis they can be swiveled in relation to one another between an assembly state and an operating state, and wherein the first base area and the second base area in the operating state substantially form a hollow cylindrical shape.
  • the protective device according to the invention is particularly advantageous in being suited to a shock absorber of a commercial vehicle, since the installed situation of shock absorbers in commercial vehicles generally allows elements such as the protective device to be arranged and fastened on the mounting eye of the piston portion, which serves for fixing the shock absorber to the chassis frame of the vehicle.
  • the protective device comprises a first base area and a second base area, which perform the actual protective function of the protective device.
  • the first base area and the second base area are designed in such a way that they protect the parts of the shock absorber to be duly protected—generally its exposed piston portion—from external influences.
  • the first base area and the second base area are advantageously made from a material which withstands external influences, for example a plastic or a metal.
  • the first base area and the second base area are designed to move in relation to one another, in such a way that via a swivel axis they can be swiveled between an assembly state and an operating state.
  • the protective device can be brought into or may have an assembly state in which the protective device can be arranged on a shock absorber. From the assembly state the protective device can be brought into an operating state, in which the protective device—fixed to the shock absorber—assumes the function of protecting the shock absorber from external influences.
  • the swivel axis may be arranged directly on the first base area and/or the second base area or also indirectly, separated therefrom by interposed elements.
  • the interposed element might be a strap, for example, which connects the first base area and the second base area to one another, so that the swivel axis need not be invariably fixed in relation to the first base area and the second base area, but instead—owing to the flexibility of the strap—may be variable in its position.
  • the main thing here, however, is that means are provided, which allow the first base area to be swiveled in relation to the second base area. In the operating state the first base area and the second base area substantially form a hollow cylindrical shape.
  • first base area and the second base area in the operating state may also comprise portions which deviate from a hollow cylindrical shape, it being advantageous if the first base area and the second base area in the operating state predominantly have or form a hollow cylindrical shape along their cylinder axis.
  • the cross section of the hollow cylindrical shape may be of any shape, for example polygonal, although it is particularly advantageous if it is round or circular.
  • the hollow cylindrical shape formed by the first base area and the second base area in the operating state is open at least one end face, and the opposite end face may advantageously be at least partially closed or formed with a predominantly closed end.
  • the first base area and/or the second base area may therefore suitably have the configuration of a dish.
  • the fact that the first base area and the second base area can be displaced via a swivel axis between an operating state and an assembly state is especially advantageous in allowing the protective device to be easily fitted to the shock absorber, since the protective device can be snapped on over the shock absorber more or less in the assembly state and then brought into the operating state, therefore enclosing the shock absorber. Consequently, it is no longer necessary to remove the shock absorber.
  • the first base area and the second base area are advantageously connected via a hinge, in particular a film hinge.
  • the hinge may be arranged on the first base area and/or the second base area by way of interposed elements. It is particularly suitable, however, if the hinge is arranged directly on the first base area and/or the second base area.
  • An especially reliable and durable protective device can be provided if the hinge is embodied as a film hinge. This is suitably composed of a thin-walled connection between the first base area and the second base area.
  • Film hinges are particularly preferred in an embodiment of the first base area and the second base area composed of plastic. It is especially suitable if the hinge and in particular the film hinge extends over the predominant part, advantageously over the whole of the hollow cylindrical shape formed by the base areas. The unbroken nature of the hinge affords an especially efficient protective effect, since it prevents foreign bodies getting into the interior of the protective device via the swivel axis.
  • the first base area and the second base area are suitably formed in one piece.
  • the hinge is embodied as a film hinge, since the first base area and the second base area and the film hinge integrally formed with these areas can be formed from a plastic material.
  • further elements may be formed as separate parts on the first base area and the second base area, or may likewise be integrally formed, however, together with the first/second base area.
  • the swivel axis suitably lies parallel or perpendicular to the cylinder axis of the hollow cylindrical shape.
  • the swivel axis substantially corresponds to an axially running edge of the first base area and/or the second base area.
  • the hinge is embodied as a film hinge, the axially running edges of the first base area and the second base area therefore correspond to the hinge and hence to the swivel axis running parallel to the hollow cylindrical shape.
  • one end of the hollow cylindrical shape is substantially closed at the end face and the swivel axis is formed in this end, for example as a film hinge. It is particularly suitable in the case of a swivel axis running perpendicular to the cylinder axis if the swivel axis intersects the cylinder axis of the hollow cylindrical shape.
  • the protective device comprises at least one receiving portion, which is formed on the first base area and/or the second base area for receiving a bearing area of the shock absorber.
  • the bearing area of the shock absorber may, in particular, be the mounting eye of the piston portion of the shock absorber.
  • the receiving portion may be provided on one of the base areas. It is preferred, however, if the first base area and the second base area each comprise a receiving portion for receiving the bearing area of the shock absorber. It is particularly advantageous if the receiving portion is configured in such a way that the bearing area of the shock absorber can extend or protrude outwards through the latter.
  • the receiving portion can therefore advantageously provide a non-positive and/or positively interlocking connection between the protective device and the bearing area of the shock absorber, so that a displacement of the protective device relative to the shock absorber can be counteracted or prevented.
  • the receiving portion(s) is/are preferably formed as a recess or opening extending into at least one of the base areas, which openings is/are preferably of a curved or sectorial shape.
  • the receiving portion therefore more suitably extends radially though or into the base area(s) and therefore suitably forms an opening, through which the bearing area of the shock absorber can extend from the inside of the protective device outwards.
  • the opening or recess advantageously has a curved or sectorial surface configuration. In particular, the opening or recess is of approximately semicircular-shaped design. Since the bearing area of the shock absorber extending through the recess or the opening generally also forms a curved surface, a secure connection can be provided between the protective device and the shock absorber in this area which is especially protected against dirt.
  • the receiving portion is advantageously provided on an axially running edge of the first base area and/or the second base area.
  • Two opposing receiving portions are suitably provided on at least one of the base areas. It is particularly advantageous if the opposing receiving portions have substantially the same configuration and are more advantageously formed coaxially with an axis running perpendicularly to the cylinder axis. The opposing receiving portions are more advantageously configured in such a way that their axis, on which they coaxially lie, intersects the cylinder axis.
  • the receiving portion preferably comprises an edge protruding radially outwards.
  • the receiving portion is formed in such a way that it protrudes radially outwards beyond the basic shape formed by the first or second base area. This makes it possible to endow the receiving portion with an especially stable form.
  • the receiving portion of the first base area and the receiving portion of the second base area preferably adjoin one another in such a way that they form a peripherally closed opening, through which the bearing area of the shock absorber can at least partially protrude.
  • the receiving portions of the first base area and the second base area are advantageously at least partially provided on the axially running edge of the base areas, so that the receiving portions of the base areas do not adjoin one another in the assembly state, but adjoin or touch one another in the operating state. It is possible to arrange the receiving portions entirely in the area of the axially running edge without providing the receiving portions at the end face of the base areas. Consequently, a peripherally closed opening is formed in the operating state of the base areas. This affords an especially advantageous protection of the shock absorber against external influences.
  • one of the base areas comprises at least one latching element and the other base area at least one catch, in which the latching element can engage in order to keep the protective device in the operating state.
  • one of the base areas may also comprise latching elements and catches, it being particularly advantageous if these alternate with one another and the other base area comprises matching catches and latching elements.
  • the latching elements may be formed from hooks or clips, for example, which can be brought into engagement with corresponding catches.
  • the latching elements and catches make it possible to keep the protective device in the operating state and to return the protective device to the assembly state when the latching elements are released from the catch.
  • the protective device is therefore suitably designed in such a way that repeated shifting between the assembly state and the operating state is possible. In this respect the protective device is of a design suited to dismantling.
  • the latching element and the catch are advantageously each formed on one or on both axially running edges of the base areas. It is thus possible to create a configuration, for example, in which the swivel axis is provided on a preferably common axial edge of the base areas, whilst the latching elements and catches are provided on the other, opposite edge of the respective base area. In the case of a swivel axis running perpendicular to the cylinder axis it is particularly advantageous if the latching elements and catches are each provided on both axial edges of the two base areas.
  • An axially projecting strap is preferably provided on one base area, which strap at its free end can be brought into engagement with the other base area.
  • the strap With one of its ends, therefore, the strap is in particular integrally joined in one piece to a base area.
  • the strap is designed in such a way that in the operating state of the protective device this strap can be brought by its free end into engagement on the other base area.
  • the strap comprises means of engagement at its free end and the other base area comprises corresponding means.
  • the strap is suitably provided at the end of the base area where or in proximity to which the receiving portion is provided.
  • a shock absorber arrangement is furthermore provided, in particular a commercial vehicle shock absorber arrangement, comprising a shock absorber having a piston portion and a cylinder portion, which are longitudinally moveable in relation to one another or displaceable in one another, and a protective device, in particular one as has been described above, which comprises a first base area and a second base area, which are connected to one another in such a way that via a swivel axis they can be swiveled in relation to one another between an assembly state and an operating state, wherein the protective device can be arranged on the shock absorber in such a way that in the operating state the first base area and the second base area enclose the piston portion.
  • the protective device is or can be secured in position relative to the shock absorber and in particular to its piston portion.
  • the protective device can be fixed, in particular, to the remote end or bearing area or bearing eye of the piston portion.
  • the protective device is designed in such a way that it radially or peripherally encloses the piston portion.
  • the first base area and the second base area of the protective device suitably extend at least partially, preferably predominantly and more preferably over the entire part of that piston portion which in its extended state lies outside the cylinder portion.
  • the protective device in the fully extended state more suitably also covers a remote end of the cylinder portion facing the piston portion.
  • the inside diameter of the hollow cylinder formed by the first base area and the second base area in the operating state is advantageously greater than, preferably 1.01 to 1.3 times greater than and more preferably 1.02 to 1.2 times greater than the outside diameter of the cylinder portion of the shock absorber.
  • FIG. 1 shows a first preferred embodiment of a protective device according to the invention in the operating state
  • FIG. 2 shows the protective device according to FIG. 1 in the operating state
  • FIG. 3 shows a further embodiment of a protective device according to the invention in the assembly state
  • FIG. 4 shows the protective device according to FIG. 3 in the operating state
  • FIG. 5 show a preferred embodiment of a shock (a) and (b) absorber arrangement according to the invention
  • FIG. 6 shows a further preferred embodiment of a shock absorber arrangement according to the invention.
  • FIGS. 1 and 2 a first embodiment of a protective device according to the invention is represented: in the assembly state (not shown) and in the operating state ( FIGS. 1 and 2 ).
  • the protective device comprises a first base area 2 and a second base area 4 , which can be swiveled in relation to one another via a swivel axis x.
  • the first base area 2 and the second base area 4 each have axially running edges 6 , wherein the axially running edges 6 of the base areas 2 , 4 lie substantially side by side or against one another or opposite one another in the operating state.
  • the first base area 2 and the second base area 4 are in the operating state they form, at least in areas, a hollow cylindrical shape, which defines a longitudinal or cylinder axis y. It is particularly suitable if the axially running edges 6 run substantially parallel to the cylinder axis y.
  • a hinge 8 which more advantageously may be embodied as a film hinge, is provided between them.
  • the first base area comprises a plurality of latching elements 10 on one of its axially running edges 6 , which engage in corresponding catches 12 .
  • the hollow cylinder formed by the base areas 2 , 4 has an open end 14 at one of its end faces.
  • a receiving portion 16 which serves for receiving a bearing area of the shock absorber, is formed on an area situated opposite the open end 14 , in particular also at a remote end.
  • the receiving portion 16 is formed on each of the base areas 2 , 4 and on each of their axially running edges 6 .
  • the receiving portion 16 in each case has a sectorial geometry and is formed with an edge 18 projecting radially outwards in order to strengthen the receiving portion 16 .
  • a strap 20 which comprises corresponding means of engagement at its free end 22 , allowing it to engage with means of engagement on the second base area 4 , is formed at the end of the first base area 2 situated opposite the open end 14 .
  • the strap 20 is more suitably of flexible formation, in order that it may be bent towards the second base area 4 (cf. FIG. 2 ).
  • the swivel axis x does not lie parallel to the cylinder axis y but instead lies perpendicular to the cylinder axis y.
  • a hinge 24 is therefore provided, which is formed not on the axially running edges 6 but at the at least partially closed end of the base areas 2 , 4 situated opposite the open end 14 .
  • a further difference compared to the embodiment described with reference to FIGS. 1 and 2 is that the receiving portions 16 are formed exclusively on the axially running edges 6 of the base areas 2 , 4 , and do not extend into the remote end of the base areas 2 , 4 . As shown in FIG. 5 , in the operating state of the protective device the receiving portions 16 therefore form a peripherally closed opening 26 .
  • FIG. 5 represents one embodiment of a shock absorber arrangement according to the invention.
  • the shock absorber arrangement comprises a shock absorber 50 , which has a piston portion, which is capable of retracting and extending in a cylinder portion 52 .
  • the piston portion comprises a bearing area 54 and the cylinder portion 52 comprises a bearing area 56 , which are usually embodied as mounting eyes.
  • the first base area 2 and the second base area 4 of a protective device corresponding to the embodiment represented in FIGS. 1 and 2 enclose the piston portion in the operating state. This serves to prevent foreign bodies getting into and onto the piston portion.
  • the inside diameter of the hollow cylinder formed by the first base area 2 and the second base area 4 is greater than the outside diameter of the cylinder portion 52 , at least in the area of the piston portion which is able to immerse in the cylinder portion 52 .
  • FIG. 6 represents a further embodiment of a shock absorber arrangement according to the invention.
  • the first base area 2 and the second base area 4 of a protective device corresponding to the embodiment represented in FIGS. 3 and 4 enclose the piston portion in the operating state.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
US15/128,513 2014-03-25 2015-03-16 Protective device for a shock absorber Active US9874262B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102014205501 2014-03-25
DE102014205501.6 2014-03-25
DE102014205501.6A DE102014205501B4 (de) 2014-03-25 2014-03-25 Schutzvorrichtung für einen Stoßdämpfer
PCT/EP2015/055402 WO2015144471A1 (de) 2014-03-25 2015-03-16 Schutzvorrichtung für einen stossdämpfer

Publications (2)

Publication Number Publication Date
US20170276207A1 US20170276207A1 (en) 2017-09-28
US9874262B2 true US9874262B2 (en) 2018-01-23

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ID=52697391

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Application Number Title Priority Date Filing Date
US15/128,513 Active US9874262B2 (en) 2014-03-25 2015-03-16 Protective device for a shock absorber

Country Status (10)

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US (1) US9874262B2 (de)
EP (1) EP3123056B1 (de)
CN (1) CN107110274B (de)
AU (1) AU2015238657B2 (de)
CA (1) CA2943462C (de)
DE (1) DE102014205501B4 (de)
ES (1) ES2760522T3 (de)
MX (1) MX373116B (de)
RU (1) RU2645182C1 (de)
WO (1) WO2015144471A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11047446B2 (en) * 2018-07-03 2021-06-29 Ab Elektronik Gmbh Shock absorber with position sensor
WO2023069504A1 (en) * 2021-10-22 2023-04-27 DRiV Automotive Inc. Two piece plastic dirt shield for shock absorbers
US20240300603A1 (en) * 2023-03-10 2024-09-12 Justin NARDELLA Stanchion guard

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017221591A1 (de) * 2017-11-30 2018-12-20 Zf Friedrichshafen Ag Schutzrohr für einen Kraftfahrzeugschwingungsdämpfer
EP4075013A4 (de) * 2019-12-11 2022-12-28 Hitachi Astemo, Ltd. Stossdämpfer
DE102023207159A1 (de) * 2023-07-27 2025-01-30 Zf Friedrichshafen Ag Schutzrohr für einen Schwingungsdämpfer eines Kraftfahrzeugs
FR3162676A1 (fr) * 2024-06-03 2025-12-05 Renault S.A.S Dispositif de protection contre l’impact de gravillons d’un amortisseur de véhicule automobile

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GB868226A (en) 1958-11-20 1961-05-17 Hubert Rothery Collapsible pleated covers or bellows for rams and shafts and helical springs
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DE4327915A1 (de) 1993-08-20 1995-03-02 Fichtel & Sachs Ag Werk Eitorf Hydraulischer Teleskop-Schwingungsdämpfer
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EP1845279A1 (de) * 2006-04-11 2007-10-17 Al-Ko Kober Ag Schutzrohr für Stoßdämpfer
US20100044965A1 (en) 2006-05-01 2010-02-25 Eddie York-Shin Lou Laminated Multiple-layered split boot
US7637520B2 (en) * 2007-02-01 2009-12-29 Kuryakyn Holdings, Inc. Motorcycle lower fork tube cover
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DE102009051456A1 (de) 2009-10-30 2010-05-27 Daimler Ag Schutzanordnung
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US9657801B2 (en) * 2014-01-08 2017-05-23 John E. Hansen Shock absorber protector
US20160115975A1 (en) * 2014-10-25 2016-04-28 Stabilus Gmbh Piston-cylinder unit

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11047446B2 (en) * 2018-07-03 2021-06-29 Ab Elektronik Gmbh Shock absorber with position sensor
WO2023069504A1 (en) * 2021-10-22 2023-04-27 DRiV Automotive Inc. Two piece plastic dirt shield for shock absorbers
US11940033B2 (en) 2021-10-22 2024-03-26 DRiV Automotive Inc. Two piece plastic dirt shield for shock absorbers
US20240300603A1 (en) * 2023-03-10 2024-09-12 Justin NARDELLA Stanchion guard

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DE102014205501A1 (de) 2015-10-01
US20170276207A1 (en) 2017-09-28
CA2943462C (en) 2018-02-27
CN107110274A (zh) 2017-08-29
EP3123056A1 (de) 2017-02-01
CA2943462A1 (en) 2015-10-01
MX373116B (es) 2020-07-06
EP3123056B1 (de) 2019-10-02
MX2016012237A (es) 2017-01-19
CN107110274B (zh) 2020-12-08
AU2015238657A1 (en) 2016-10-27
ES2760522T3 (es) 2020-04-15
DE102014205501B4 (de) 2018-12-13
AU2015238657B2 (en) 2018-05-31
RU2645182C1 (ru) 2018-02-16
WO2015144471A1 (de) 2015-10-01

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